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Network firewall security10/31/2023 ![]() The king may be allowed in any room (any port), while guests and servants may only access a certain number of rooms (specific ports). Once inside, only people within the house are permitted to enter certain rooms (destination ports), depending on who they are. Or perhaps only people that arrive on foot (protocol). Only trusted people (source addresses) may enter the castle (destination address) at all. The protocol represents a mode of transportation, and the destination address represents the castle. The port represents a room in the castle. The source address represents a person wishing to enter the castle. Instead of protecting a network, think of a giant castle. Here’s an analogy to explain the components of a firewall rule. A firewall rule will typically include a source address, a protocol, a port number and a destination address. How does firewall technology work?įirewalls carefully analyze incoming traffic arriving on a computer’s entry point, called a port, which determines how external devices communicate with each other and exchange information.įirewalls operate using specific firewall rules. Many firewall architectures are built into other security solutions, and many security solutions are built into firewalls. ![]() For instance, intrusion detection systems, routers, proxy servers, VPNs and antivirus solutions are not firewalls. When discussing firewalls, it is critical to clear up any confusion regarding what constitutes a firewall and what does not. ![]() Depending on the security rules assigned specifically to it, the firewall either permits safe traffic or denies traffic it deems as dangerous.Ī firewall’s main objective is to establish a barrier (or “wall”) that separates an internal network from incoming external traffic (such as the internet) for the purpose of blocking malicious network packets like malware and hacking. ![]() What is a firewall? And what isn’t a firewall?Ī firewall is a network security perimeter device that inspects traffic entering and leaving the network. Here are the answers to some of the most common firewall questions. Making the distinction between a firewall and other security solutions can also pose challenges. ![]() Choosing a firewall may seem like a simple task, but companies can get overwhelmed by the different firewall types and options. This blog was written by a third party author.įinding the right network security tools to secure your sensitive data can be a significant challenge for any organization. ![]()
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